Decomposes in H2O, liberating NH3. Soluble in aqueous
ammonia, not soluble in conc. ammonia or alcohol.
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A cone, solution of cobalt-free NiCl2·6H2O is treated with
excess conc. NH3, then cooled in running water. The separation
of fine crystals of [Ni(NH3)6]Cl2 is completed by addition of an
ammoniacal NH4CI solution. The precipitate is filtered off and
successively washed with conc. ammonia, alcohol and ether.
